Evidently, a large proportion of babies are born in September, with the top ten birthdays falling within the autumn month. Possibly confirming suspicions we have long held about conception trends, September is nine months after the holiday season.
Decorum is defined as appropriate, polite behavior in society. An example of decorum is to show good table manners. decorum. propriety and good taste in behavior, dress, etc. an act or requirement of polite behavior: often used in pl. decorum.
Etiquette, decorum, propriety imply observance of the formal requirements governing behavior in polite society. Etiquette refers to conventional forms and usages: the rules of etiquette. Decorum suggests dignity and a sense of what is becoming or appropriate for a person of good breeding: a fine sense of decorum.